After you have installed Air Dictate on your iPhone 4S, head on over to avatron.com/i on your Mac to download and install a small OS X app (10.6.8 or higher required), which is required. Drag and drop the Air Dictate Receiver into your Applications folder and launch it after it's downloaded.

Make sure your Mac and your iPhone 4S are connected to the same Wi-Fi network, and then launch Air Dictate on your iPhone 4S.

Screenshot by Jason Cipriani

If both devices are on the same network, you should see the name of the device at the top of the Air Dictate app on your iPhone 4S. Tap on Link to pair your iPhone 4S with the Mac you installed the Air Dictate Receiver on earlier.

Screenshot by Jason Cipriani

Once you have initiated the link process, you will be presented with an authorization window on your Mac. Accept the request to complete the setup of Air Dictate.

Screenshot by Jason Cipriani

Now that you have linked your iPhone 4S to your Mac, you can press on the mic button and begin speaking. Once you are done speaking, make sure to press the mic button again. After a few seconds you will see what you just spoke into your iPhone 4S show up on your Mac, like magic.

Screenshot by Jason Cipriani

Please note that you will need to be using a text editor, or have a text field highlighted in order for Air Dictate to work. You can't simply speak into it and expect the text to show up, without giving it some sort of direction or place to be entered.